“660-700” 660AV accelerator

[mrpippy]

I picked up this 660AV at an estate sale, it has an accelerator I can’t find any info about. “P/N 660-700 REV. 1” is the only marking on the top. 

On the CPU, I can see “XC68” but the rest is covered with thermal adhesive, it’s an “E31F” mask code.

Anyone seen one of these before?

/monthly_2020_04/large.1E7F72C5-6D09-4026-8DE3-32272EEC47EE.jpeg.c40aa75a75d3bb4f34077186283ca1dd.jpeg

 

[johnklos]

That's one of several kinds of clock doublers for m68040 CPUs. Since the 660AV runs at 25 MHz, this would run the CPU at 50 MHz when no bus activity is going on. Good score!

 

[Unknown_K]

Looks like the CPU upgrade in my Q950 (68040/50) but without the added cache. I didn't think you could use those in AV Quadras but I guess I was wrong.

 

[AlpineRaven]

Pack it up and send it to me please
Cheers

AP

 

[mrpippy]

Yes, it's a Sonnet QuadDoubler! The picture on Sonnet's (archived) site doesn't look anything like the real thing, but I've found some other pictures (and benchmarks showing a 60-80% speedup). Really hope I can get this machine running again.

https://translate.google.com/translate?hl=en&sl=ja&u=http://www.club6100.net/%3FTuneUp%2F6100%2FCentris660%A4%CB%A5%A2%A5%AF%A5%BB%A5%E9%A5%EC%A1%BC%A5%BF%A4%F2&prev=search

 

[ghost180sx]

Confirm this is a QuadDoubler 50/100. I have this in my 660AV, which the previous owner bought for it. I have the original box, docs, and original CPU which the owner provided when I acquired it. It's fully compatible with the 660AV as a drop in replacement, no software update needed.